Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 22521-56SP found under Adapter Tie Down Ai by Telair International Incorporated. The National Stock Number assigned to this part is 1670014926516, and the Federal Supply Class is 1670 Parachutes Aerial Pick Up Delivery Recovery Systems And Cargo Tie Down Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 22521-56SP.